Experimental Investigation of the Ejector Refrigeration Cycle for Cascade System Application
- PDF / 693,172 Bytes
- 11 Pages / 595.22 x 842 pts (A4) Page_size
- 105 Downloads / 210 Views
https://doi.org/10.1007/s11630-020-1367-2
Article ID: 1003-2169(2020)00-0000-00
Experimental Investigation of the Ejector Refrigeration Cycle for Cascade System Application HAO Xinyue1,2, GAO Neng2*, CHEN Guangming2, VOLOVYK Oleksii2, WANG Xuehui3, XUAN Yongmei2 1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China 2. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China 3. Fluids and Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK © Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract: Ejector refrigeration cycle (ERC) with advantages of simple structure and low cost holds great application potential in cascade/hybrid cycles to improve the overall system performance by removing or recovering the heat from the main cycle. In this paper, a theoretical and experimental investigation of the ERC as a part of a cascade system was carried out. The operating parameters were optimized. The experimental ERC test rig was designed, developed and investigated at high evaporating temperatures and wide ranges of operating conditions. The influence of operating conditions on the efficiency of the ejector and ERC was analyzed. Experimental results and analysis in this study can be helpful for the application and operating condition optimization of ERC in cascade/hybrid refrigeration systems.
Keywords: ejector, ejector refrigeration cycle, cascade refrigeration system, experiment, performance
1. Introduction The mechanical vapor compression refrigeration cycle (VCRC) driven by electrical power is widely used for air-conditioning and refrigeration at the present time. The refrigeration sector consumes about 20% of the overall electricity used worldwide, and a growing amount of the cooling systems and their power consumption will increase [1]. The peaks of the electricity consumption of the cooling systems occur in the summer period when the environment temperature is high and a large amount of cold is needed. Thus, improving the efficiency of the VCRCs with the aim to decrease their power consumption is one of the primary targets. At the same time, a large amount of waste heat in Received: Mar 13, 2020
AE: WANG Lin
different forms is discharged to the environment by industry and power generation systems. This waste heat can be utilized to generate the extra cold without additional energy input which surely increases the primary fuel efficiency [2]. Among the various types of thermal refrigeration, the heat-driven ejector refrigeration cycle (ERC) holds great potential in utilizing low-grade thermal energy such as waste or exhaust heat, solar and geothermal energy, etc. [3]. The key component of the ERC is a supersonic ejector which is used as a compression device but has no moving parts. It makes ERC systems simpler in design and operation and more compact than the other types of heat-driven refrigeration systems [4]. However, the eject
Data Loading...
